Age | Commit message (Collapse) | Author |
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* Pulls common functionality (IO and locking on open) into pipe_util.go.
* Adds pipe/vfs.go, which implements a subset of vfs.FileDescriptionImpl.
A subsequent change will add support for pipes in memfs.
PiperOrigin-RevId: 275322385
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PiperOrigin-RevId: 275139066
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Standard Linux kernel versions are VERSION.PATCHLEVEL.SUBLEVEL. e.g., 4.4.0,
even when the sublevel is 0. Match this standard.
PiperOrigin-RevId: 275125715
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Linux kernel before 4.19 doesn't implement a feature that updates
open FD after a file is open for write (and is copied to the upper
layer). Already open FD will continue to read the old file content
until they are reopened. This is especially problematic for gVisor
because it caches open files.
Flag was added to force readonly files to be reopenned when the
same file is open for write. This is only needed if using kernels
prior to 4.19.
Closes #1006
It's difficult to really test this because we never run on tests
on older kernels. I'm adding a test in GKE which uses kernels
with the overlayfs problem for 1.14 and lower.
PiperOrigin-RevId: 275115289
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When any of these flags are set, all writes will trigger a subsequent fsync
call. This behavior already existed for "write-through" mounts.
O_DIRECT is treated as an alias for O_SYNC. Better support coming soon.
PiperOrigin-RevId: 275114392
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These syscalls were changed in the amd64 file around the time the arm64 PR was
sent out, so their changes got lost.
Updates #63
PiperOrigin-RevId: 275114194
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PiperOrigin-RevId: 275114157
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- Pass context.Context to OnClose().
- Pass memmap.MMapOpts to ConfigureMMap() by pointer so that implementations
can actually mutate it as required.
PiperOrigin-RevId: 274934967
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Netstack has its own stats, we use this to fill /proc/net/snmp.
Note that some metrics are not recorded in Netstack, which will be shown
as 0 in the proc file.
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Change-Id: Ie0089184507d16f49bc0057b4b0482094417ebe1
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Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
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For hostinet, we inherit the data from host procfs. To to that, we
cache the fds for these files for later reads.
Fixes #506
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Change-Id: I2f81215477455b9c59acf67e33f5b9af28ee0165
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This proc file reports routing information to applications inside the
container.
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Change-Id: I498e47f8c4c185419befbb42d849d0b099ec71f3
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This proc file contains statistics according to [1].
[1] https://tools.ietf.org/html/rfc2013
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Change-Id: I9662132085edd8a7783d356ce4237d7ac0800d94
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PiperOrigin-RevId: 274700093
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This allows for peeking at the length of the next message on a netlink socket
without pulling it off the socket's buffer/queue, allowing tools like 'ip' to
work.
This CL also fixes an issue where dump_done_errno was not included in the
NLMSG_DONE messages payload.
Issue #769
PiperOrigin-RevId: 274068637
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Strengthen the header.IPv4.IsValid check to correctly check
for IHL/TotalLength fields. Also add a check to make sure
fragmentOffsets + size of the fragment do not cause a wrap
around for the end of the fragment.
PiperOrigin-RevId: 274049313
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The signalfd descriptors otherwise always show as available. This can lead
programs to spin, assuming they are looking to see what signals are pending.
Updates #139
PiperOrigin-RevId: 274017890
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PiperOrigin-RevId: 273861936
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PiperOrigin-RevId: 273781641
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Also change the default TTL to 64 to match Linux.
PiperOrigin-RevId: 273430341
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PiperOrigin-RevId: 273421634
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PiperOrigin-RevId: 273365058
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PiperOrigin-RevId: 273364848
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PiperOrigin-RevId: 272987037
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In Linux (include/linux/types.h), mode_t is an unsigned short.
PiperOrigin-RevId: 272956350
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The input file descriptor is always a regular file, so sendfile can't lose any
data if it will not be able to write them to the output file descriptor.
Reported-by: syzbot+22d22330a35fa1c02155@syzkaller.appspotmail.com
PiperOrigin-RevId: 272730357
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PiperOrigin-RevId: 272522508
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Right now, we can find more than one process with the 1 PID in /proc.
$ for i in `seq 10`; do
> unshare -fp sleep 1000 &
> done
$ ls /proc
1 1 1 1 12 18 24 29 6 loadavg net sys version
1 1 1 1 16 20 26 32 cpuinfo meminfo self thread-self
1 1 1 1 17 21 28 36 filesystems mounts stat uptime
PiperOrigin-RevId: 272506593
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gVisor does not currently implement the functionality that would result in
AT_SECURE = 1, but Linux includes AT_SECURE = 0 in the normal case, so we
should do the same.
PiperOrigin-RevId: 272311488
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